Math New Year Puzzle

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Across
  1. 3. Angle Two straight lines intersect to form a 180 degree angle
  2. 7. Triangle A closed triangle formed by a two edge of 6cm and a side of 8cm
  3. 9. Angle Two straight lines intersect to form a 60 degree angle
  4. 10. Triangle A closed triangle formed by a side of 3cm, a side of 4cm, and a side for 5cm
  5. 11. For 5-3=2, the name of math terminology for 5
  6. 12. Triangle Closed triangle formed by three 6cm edges
  7. 13. For 60/4=15, the name of math termonology for 4
  8. 15. For 60/4=15, the name of math termonology for 15
Down
  1. 1. Angle A corner formed vertically between two straight lines
  2. 2. For 60/4=15, the name of math terminology for 60
  3. 4. Angle Two straight lines intersect to form a 240 degree angle
  4. 5. For 60/7=8......4, the name of math terminology for 4
  5. 6. For 10*3=30, the name of math terminology for 10
  6. 8. For 5-3=2, the name of math terminology for 3
  7. 11. For 10*3=30, the name of math termonology for 3
  8. 14. Angle Two straight lines intersect to form a 120 degree angle